Aira
hairgrass
3 species
1 subspecies and varieties
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Common name
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Aira caryophylleasilver hairgrass
Distribution: Introduced and common west of the Cascades, British Columbia to California
Habitat: A weed in moist to dry, gravelly soil
Origin: Introduced
Flowers: May - August
var. caryophyllea – silver hairgrass
Aira elegansdelicate hairgrass
Origin: Introduced
Aira praecoxearly silver-hair grass
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia south to California; Nova Scotia south to Virginia in eastern North America.
Habitat: Gravelly prairies, sea bluffs and dunes near the coast, also in other disturbed, open areas at low elevations.
Origin: Introduced
Flowers: April-September